It's now been 35 years since the Mount St. Helens volcano erupted in a spectacular explosion. The scars of that event are still clearly evident in the Landsat 8 image above.
The eruption, which occurred on May 18, 1980, caused a cataclysmic collapse of the northern flank; an avalanche and an explosion, which killed 57 people and devastated hundreds of square miles of the surrounding landscape.
The image above shows the mountain, looking toward the southeast, as it appeared on April 30, 2015.
The volcanic horseshoe-shaped crater and its lava dome can be clearly seen near the upper right of the image.
The ripped open northern flank of the volcano leads down along a pumice plain to Spirit Lake in the upper centre of the image.
To the right of Spirit Lake lie vast debris avalanche deposits surrounding the tiny St Helens Lake and the long line of Coldwater Lake.
At the centre right of the image is Castle Lake.
Countdown to disaster Mount St. Helens is an active stratovolcano located in the Cascade Ranges in Washington state. The Cascade Volcanic Arc is part of the Pacific Ring of Fire, which includes over 160 active volcanoes.
By March 1980, geologists had been monitoring ever-increasing rumbles inside the awakening volcano for several months with the mountain experiencing small earthquakes and a growing number of steam vents.
By the end of April, the mountain's northern flank began to bulge.
The worsening volcanic activity reached its crescendo at 8:32 on the morning of May 18, when an earthquake measuring 5.1 triggered an explosive eruption and the massive collapse of the northern face of the mountain in one of the largest known debris avalanches in recorded history.
The eruption blew off the top of the mountain, released a huge flow of magma, generated a massive pyroclastic flow that flattened everything in its path over an area of 372 square miles, and set forth floods of debris and melt water, known as lahars, which thundered down river valleys.
In the eruption's wake, denuded trees lay like matchsticks, clouds of ash covered the landscape, and the mountain's 9,678-foot summit had been reduced to 8,366 feet and replaced with a nearly mile-wide, horseshoe-shaped crater.
The eruption also destroyed 250 homes, 47 bridges, 15 miles of railways, and 185 miles of roads in what was the deadliest and most economically destructive volcanic event in the history of the United States.
Scientists estimate the eruption released over 1.5 million tons of sulfur dioxide into the atmosphere, and recorded a Volcanic Explosivity Index of five.
The image was assembled from data acquired by the Operational Land Imager on Landsat 8 and the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER) on the Terra satellite.
This article originally appeared on ABC Science Online.